RTRendererAPI 4.2.2

Fix exact-camera rotation packing to match the GPU uniform row stride. This corrects rays for non-identity exact camera matrices while preserving double precision translation and the public ABI.

Validation: full strict acceptance and signed Central bundle verification passed, including native Vulkan/NVIDIA gates and an independent Maven consumer. Version 4.2.2 is published to Maven Central for renderer-api, renderer-core, and renderer-nvidia.

Binary distribution: Maven Central. This release records the annotated source tag.

RTRendererAPI 4.2.1

RTRendererAPI 4.2.1 fixes Vulkan buffer visibility for indexed triangle and procedural AABB builds. Explicit partial or shader barriers no longer suppress required acceleration-structure dependencies, and subsequent writes invalidate prior visibility.

The NVIDIA bridge explicitly initializes centered camera pinhole offsets. Native regressions cover the constants contract and SDK failure propagation. Frame-generation acceptance now uses the correct recommended 2x policy and avoids startup deadline catch-up bursts; NRD + DLSS SR + FG is included in release acceptance.

Validation: strict release acceptance passed (184 tasks); the final focused FG/adaptive/composed matrix and signed Central bundle/checksum verification passed (45 tasks). Public ABI is byte-identical to 4.2.0. MFG remains expert-only: short 3x runs can present native frames only; stable 3x pacing is not guaranteed.

Maven coordinate: top.ceroxe.rt:renderer-api:4.2.1. All three modules use version 4.2.1.

RTRendererAPI 0.3.0

Highlights

• Java 21 is now the compilation and runtime baseline; published API and Core artifacts use classfile major version 65 while Gradle may continue to run on Java 25.
• SceneInstance now owns validated per-instance lightmap coordinates, including a generic unpacked builder and a packed-host path.
• GPUScene meshes without vertex lightmap coordinates use the instance fallback in both closest-hit and any-hit shading.
• Optional GPU stream removal no longer treats absent compact-mesh attributes as live allocations.
• LWJGL 3.3.3 compatibility paths free the native allocation base independently of buffer position.

Verified

• Full 109-task strict acceptance gate, API ABI 0.3.0, staged Maven consumer, SBOM/license/checksum gates, and 18 pinned SPIR-V variants.
• Java 21 compilation with both LWJGL 3.4.2 and compatibility baseline 3.3.3; API and Core classfile major version 65.
• Native Vulkan validation, BLAS/TLAS compaction and update, complex GPUScene rendering, and 1920x1080 throughput on NVIDIA GeForce RTX 5080 Laptop GPU.
• Signed Maven Central bundle verified with API/Core JAR, sources, Javadoc, POM, Gradle metadata, and detached signatures.

See CHANGELOG.md, docs/Java.md, docs/Java-API-Reference.md, and docs/SUPPORT.md for the complete contract.

RTRendererAPI 0.2.0

Highlights

• Official renderer-bound Vulkan swapchain presenter with IMMEDIATE / MAILBOX / FIFO reporting and bounded producer lead.
• Capacity-aware trySubmit path that removes exception-based normal backpressure.
• Correct retained-frame lifecycle so uncapped trace work cannot starve visible presentation.
• Stable external-image resourceId and explicit memoryTypeIndex for safe import reuse.
• Persistent TLAS update lane using ALLOW_UPDATE / MODE_UPDATE with reusable instance, scratch, and destination resources.
• Bounded GGX metallic scene reflections and asynchronous managed CPU-frame readback.

Verified

• Full 99-task release gate, 0-warning Javadoc, ABI 0.2.0, staged Maven consumer, SBOM/license/checksum gates.
• Native external-memory completion and TLAS update tests on NVIDIA GeForce RTX 5080 Laptop GPU.
• 2560x1600 IMMEDIATE three-ball Demo: 166.5 / 117.4 / 56.6 / 24.7 Present FPS at 1 / 2 / 4 / 8 spp in the recorded acceptance run.

See CHANGELOG.md, docs/MIGRATION.md, and docs/Vulkan-Interop.md for complete contracts and migration details.